Locomotive-grate shaker.



I. W. MARTIN. LOOOMOTIVE GRATE SHAKER.

APPLICATION FILED APR. 1 1912.

Patented Nov. 4, 1918.

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LOGOMOTIVE GRATE SHAKER.

APPLICATION FILED APB,.1,1912.

Patented Nov. 4, 1913 3 SHEETSSHB ET 2.

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LOGOMOTIVE GRATE SHAKER.

APPLICATION FILED APR. 1, 1912.

Patented NOV. 4, 1913 3 SHEETS-SHEET 3.

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LOGGMOTIVE-GRATE SHAKER.

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To all whom it may concern.

Be it known that I, FREDERICK W. MAR TIN, of the borough of Manhattan in the city, county, and State of New York, have invented a certain new and useful Improvement in Locom0tive- Grate Shakers, of

' which improvement the following is a specification.

My invention relates to fluid pressure actuated mechanism for rocking or shaking the grates of steam boiler furnaces, more articularly those of locomotive boilers, and its object is to provide simple and efi ective means, of ready applicability in locomotive engines of the various constructions now in I service, whereby different. desired portions or sections of grates of the rocking type may be shaken or rocked, either independently or simultaneously, and with, a greater or less range of motion, as may from time to time be required to clear the grates of clinkers and cinders and permit tree access to the fuel thereon.

' The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1 is a rear view, in elevation, of a locomotive.

firebox, illustrating an embodiment of my invention; Fig. 2, a vertical longitudinal central section through the rear end portion of the same; Fig. 3, a transverse section, on an enlarged scale, on the line (i a of Fig. 2; Figs. 4, 5, 6; and 7, rear views, in elevation, illustrating different arrangements of the operating levers, arms, and locks; Figs. 8, 9, 10 and 11, plan views'of the constructions .shoiv-n in Figs. 4 to 7,'respectively; Fig. 12, a horizontal section, on the line I) Z) of Fig. 7 and Fig. 13, a horizontal section through thefire box.

My invention is herein illustrated as applied in connection with the firebox, 3, ot' a locomotive boiler, which is provided with a plurality of rocking grate bars, 5, which, as in ordinary practice, are pivoted, transversely to the firebox, in longitudinal bearers', 5, secured thereto. The grate bars are disposed in two independent sets, one on each' side ot'the central. bearer, and the grate bars on each side are coupled together in two independent sections, a front and a rear one, bothbf which may be rocked coincidently, or either of which may be rocked independently. The members of each side set of grate bars are aotu ated bythe piston of an independent fluid Specification of Letters Patent. Application filed April 1', 1912.

the firebox adjacent to which the lever, 7

Patented Nov. 4, 1913. Serial No. 687,654.

pressure motor cylinder, 1, secured in positionbelow the deck plate or foot plate,- 2,- of the locomotive, the movements of thepiston] of said cylinder vibrating a double armed actuating lever, 7, and being effected by the action of fluid under pressure which is admitted to and exhausted from the opposite ends of the cylinder through pipes, 4:, 4:", controlled by a suitable manually actuated operating valve mechanism, 12. The construction thus far described does not, in and of itself, constitute part of my inven tion. The vibratory or swinging movements of the lever, '7, of each of the motor cylinders, 1, are transmitted to the grate bars of the two sections of the side set of grate bars in rear of which said lever is lmated, through mechanism which will now be described, it being understood that the. operating and transmit-ting mechanisms on the two sides of the firebox are similar in construction and manner of operation, and

therefore that the description of either one of them is equally applicable to the other.

The lower arm of the actuating lever, 7,

is coupled, by a link or connecting rod, 8, to

the lower arm of a vertical double armed lever, 9, which descriptively, may be termed a,

arms. are journaledon the pivot, 9*, on op-'v posite sides 01 the power lever, 9, one of said grate levers, as 10, being coupled, by a rod or link, 11, to two parallel bars, 11, which are in turn coupled to downwardly depending arms on'the grate bars comprising the rear section of the set on. the side of located. The, other grate lever, .as 10 is coupled by a rod orlink, 11", to two parallel bars, 11, which are similar to the bars, l1", and which are similarly coupled to down wardly depending arms on the grate bars comprising the front section of the set on the same side of the firebox.

pivot, 9 fitted in brackets, 9

It will be seen that, under the above construction, if the movements of the power lever, 9 are transmitted to the grate lever, 10, the gi'ate 'bars of the rear section be rocked; if to the gate lever, 10*, the grate bars of the froht section will be rocked and if to both gtate levers,- the grate bars -of;beth-Jsections will be rocked. In

will order to enect such transmission, as well as to regulate the degree of movement imparted to the grate bars, connecting and regulating members of the following construction, are provided.

Referring first to Figs. 1 to 4; inclusive and Fig. 8, the power lever, 9, is connected w th either or both of the grate levers, 10'

and 10, by an attachable and detachable coupling cap, 18, in which are formed three parallel sockets, adapted to fit over and engage the upper. ends of the power lever, 9, and. grate levers, 10, 10, or the power lever and either one of the grate levers, as desired. When all three of the levers are engaged by the coupling cap, as shown at the.

left of Fig. 2, both sections of theset of grate bars on that side of the firebox will be rocked when the actuating lever of that set is vibrated. hen the power lever and the grate lever, 10*, are en-' lever and the grate lever, 10, are engaged by the coupling cap, asshown, in Fig. i, the

rear section only of the set will be rocked.

Figs. 5 to 7 inclusive, and 9 to 12 inclusive, illustrate a structural modification of the means for connecting thepower lever with either or both of the grate levers, the same consisting in coupling arms, 14, which are pivoted to swing on the upper ends of the power levers, each of said arms being socketed on its outer end to engage the.

adjacent grate lever, said arms transmitting the movements of the power levers to the grate levers similarly to the socketed cou-- pling caps before described, and constitutingthe mechanical equivalents. thereofv As shown in Figs. 5 and 9, the power lever, 9, is interposed between the grate levers, 10 and 10*, as in the instance first described; in Figs. 6 and 10, it is shown as bifurcated or of U form, each of its members carrying a coupling arm, 14-, which engages the adjacent gratelever, 10 or 10, the lever, 10, being shown as engaged; and as shown in Figs. 7 11, and 12, it is fixed upon one endof the pivot, 9, which projects, to receive it, beyond one end oi the bracket, 9, and a sup iilemental upper power lever arm, 9, is

fixed upon the other end of the pivot, which similarly projects beyond the. bracket, Sockctcd coupling arms, 14-, adapted to engage the grate levers, 10 and 10, respecmental upper power lever arms.

The construction, so'far as described, im-

parts to thegrate levers, when engagedwith' the power lever, the full throw or traverse obtainable'from the vibratory movements of the actuatmg'lever, 7, but under certain con- I oaves? ditions of the combustion of the fuel on the grate bars, it is desirable that the latter should be only slightly shaken. 'To this -end, limiting arms, 15, are-pivoted on the bracket, 9', adjacentto the grate levers, 10. and 10 said arms havin'g recesses in their outer ends of such length as will permit only the desired limited degree of traverse of the adjoining levers, when the arms, 15,

are swung into the path thereof, as most clearly indicated at' the right of Fig. 8, from which it will be seen that the traverse. ot' the lever, 10, adjoining the right hand limiting aim, l5, will be limited by the length of the recess in saidarm within which the lever swings, and against the ends of which it abuts at the extremities of its stroke. I

In order to prevent anymotion of the grate levers, 10 and 10 when it is desired that theysha'll be held stationary, locks, 16, are pivoted to the bracket, 9 each adjacent toone of said levers, said locks having recesses'in their outer ends adapted to engage the grate levers, when swung over on their pivotal axes intoposition for effectin'g such engagement.

I am aware that mechanism whereby different desired sections of grates of the rocking type may be shaken or rocked, either independently or simultaneously,was known in the art prior to my invention, and I do not-therefore claim mechanism ofsuch character, except in so far as combined with the structural features of improvement therein which are herein set forth .and specifically recited in the claims hereof.

I claim as my invention and desire to se cure by Letters Patent:-

1. 'Ihe'combination', with a firebox having a plurality of rocking grate bars disposed in sets, the members of each ofjvhich .are

coincidently operable, of two vibratable vertical grate levers, each connected .to a set of grate bars, a vlbratable vertical power lever, ournaled concentrically with, and adjacent to, saidgrate levers, means tor actuatingsaid' powerlever by fluid pressure, and means for detachably coupling the upper portion of the power lever to the upper "portion of either or both of the grate levers.

2. Thecombination, with a firebox hav- 'ing'a plur'alitybf rocking grate bars dis:

posed in sets, the membergof eachof which are coincidently' operable, of. two vibratable vertical grate-levers, each connected'to a-set 0t grate bars, 'a vibratable vertical power lever, journaled concentrically with,'and adjace'nt to, said grate levers, means for actuating said power lever by fluid pressure,

means "for. detachably coupling the upper portibnof the power lever to the upper portiog of either or both of'the grate levers, an

tmeans 'Eor limiting the range of traverse of vthe grate levers.

said grate levers, means for actuating said power lever by fluid pressure, means for detachably coupling the upper portion of the power lever to the upper portion of either or both of the grate levers, and means for preventing movement of either or both of the grate levers.

4. The combination, with a firebox having a plurality of rocking grate bars disposed in sets, the members of each ofwhich are coincidently operable, of two vibratahle vertical grate levers, each connected to a set of grate bars, a vibratable vertical power lever, journaled concentrically with, and adjacent to, said grate levers, means for actuating said power lever by fluid pressure, and an attachable and detachable coupling having sockets adapted to engage the grate '-levers and power lever.

5. The combination, with a firebox having a plurality of rocking grate bars disposed in sets, the members of each of which are coincidently operable, of two vertical grate levers, each connected to a set of grate bars,-

a vertical vibratable power lever adjacent to said grate levers, means for actuating said power lever by fluid pressure, means for de tachably coupling the upper end of the power lever to either or both of the grate levers, and limiting arms pivoted to swing into the path of the grate levers and having recesses in their free ends, of length corresponding to a desired limited degree of traverse of said levers.

G. The combination, with a firebox having a plurality of rocking grate bars disposed in sets, the members of each of which are coincidently operable, of two Vertical Tate levers, each connected to a set of grate ars, a vertical vibratable power lever adjacent to said grate levers, means for actuating said power lever by fluid pressure, means for detach-ably coupling the upper end of the power lever to either or both of the grate levers, and locks pivoted to swing into the path of the grate levers and having recesses in their free ends adapted to engage said.

thereby prevent movement levers and thereof.

7. The con'ibination, with a firebox having a plurality of rocking grate bars disposed in sets, the members of each of which are coincidcntly operable, of a bracket fixed on the head of the firebox, two vertical double armed grate levers, each pivoted in said bracket, a vertical double armed power lever, pivoted in said bracket in line axially with and adjacent the grate levers, connections from each grate lever to a set of grate bars, a lluid pressure cylinder located below and at right angles to the pivot of the grate levers and power lever, connections from the piston of said cylinder to the power lever, and a removable coupling cap having parallel sockets adapted to engage .the upper ends of the arms of each or both of the grate levers and power lever.

FREDERICK \V. MARTIN.

' \Vitnesses a J SNOWDEN BELL, lV. T. LANE. 

